Stainless Steel 347/347H Billets are high-temperature stabilized austenitic stainless steel semi-finished products designed for demanding industrial, mechanical, and structural engineering applications. Steel Icon Stainless Pvt. Ltd. manufactures premium-quality SS 347 and 347H billets that serve as the foundation for producing bars, forgings, pipes, tubes, flanges, and other critical components used in refineries, petrochemical plants, and power generation facilities.
These billets are widely selected for environments where resistance to intergranular corrosion and sustained strength at elevated temperatures are essential. Stainless Steel 347/347H Billets provide the metallurgical stability required for pressure equipment, heat exchangers, furnace components, and structural systems exposed to cyclic heating and corrosive media.
Stainless Steel 347 and 347H are niobium-stabilized chromium-nickel austenitic stainless steels. The addition of niobium, also known as columbium, binds carbon and prevents chromium carbide precipitation at grain boundaries during welding or high-temperature service. This stabilization significantly enhances resistance to intergranular corrosion compared to non-stabilized grades.
The typical chemical composition includes approximately 17 to 19 percent chromium and 9 to 13 percent nickel, with controlled niobium content for improved structural stability. The 347H variant contains a higher carbon range, which enhances high-temperature strength and creep resistance, making it suitable for elevated temperature applications in boilers and pressure vessels.
Metallurgically, Stainless Steel 347/347H Billets exhibit a fully austenitic microstructure that ensures excellent toughness and ductility across a wide temperature range. These billets maintain strong tensile and yield properties, good oxidation resistance, and reliable performance in oxidizing and mildly reducing environments. Their ability to withstand thermal cycling and prolonged heat exposure makes them suitable for fabrication into components used in critical process industries.
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One of the main advantages of Stainless Steel 347/347H Billets is their resistance to intergranular corrosion after welding. This property is essential for pressure piping systems, structural supports, and industrial fabrication where welded joints are exposed to high temperatures and corrosive fluids.
These billets also offer excellent high-temperature strength. The 347H grade, in particular, is engineered for improved creep resistance, making it ideal for furnace parts, heat exchangers, and superheater tubes. Their oxidation resistance supports long service life in power plants and chemical processing units operating under continuous thermal stress.
Durability and structural reliability contribute to cost efficiency over time. Stainless Steel 347/347H Billets reduce the risk of premature failure, lowering maintenance costs and operational downtime. Their machinability and formability allow manufacturers to convert billets into stainless steel bars, forged components, plates, and heavy-section parts used in demanding engineering applications.
Stainless Steel 347/347H Billets in India, Stainless Steel 347/347H Billets Manufacturers in India, Stainless Steel 347/347H Billets Suppliers in India, Stainless Steel 347/347H Billets Stockists in India, Stainless Steel 347/347H Billets Exporters in India
In the oil and gas and petrochemical sector, Stainless Steel 347/347H Billets Manufacturers supply raw material for forging high-temperature flanges, fittings, and valve bodies used in refinery process units. The stabilized composition ensures resistance to corrosion and thermal fatigue in hydrocarbon processing environments.
For heavy industrial fabrication and pressure equipment production, Stainless Steel 347/347H Billets Suppliers provide billets that are further processed into pipes, tubes, and thick plates for boilers, heat exchangers, and reactor vessels. Their high-temperature performance makes them suitable for continuous service in demanding operational conditions.
In structural engineering and plant maintenance projects, Stainless Steel 347/347H Billets Stockists maintain ready inventory for conversion into bars and custom components required for power plants and chemical processing facilities. Reliable availability supports urgent manufacturing and shutdown maintenance schedules.
Across international infrastructure and energy projects, Stainless Steel 347/347H Billets Exporters deliver stabilized stainless steel billets to global markets for use in thermal power stations, offshore platforms, and industrial piping systems. Compliance with international standards and proper material certification ensures consistent quality and traceability.
Stainless Steel 347/347H Billets in United States, Stainless Steel 347/347H Billets Manufacturers in United States, Stainless Steel 347/347H Billets Suppliers in United States, Stainless Steel 347/347H Billets Stockists in United States, Stainless Steel 347/347H Billets Exporters in United States
Stainless Steel 347/347H Billets are generally produced in accordance with ASTM A240 for plate and sheet raw material chemistry reference, ASTM A276 for bars and shapes, and ASTM A479 for bars intended for pressure vessel and boiler service. The equivalent ASME specifications include ASME SA240, SA276, and SA479, which define chemical composition, mechanical properties, and heat treatment requirements for high-temperature and pressure applications. For forging and billet supply, ASTM A182 and ASTM A336 may also be relevant depending on the end use. Compliance with these standards ensures that Stainless Steel 347/347H Billets meet stringent requirements for chemical processing equipment, refinery units, and power generation systems.
Steel products such as billets, round bars, pipes, tubes, plates, sheets, and coils are classified under globally recognized standards including ASTM, ASME, EN, DIN, JIS, and ISO. ASTM and ASME standards are widely used for pressure equipment and industrial piping in North America and energy-driven economies. EN and DIN standards define European material grades and mechanical requirements, while JIS governs Japanese industrial specifications. ISO standards harmonize testing, inspection, and quality management systems across international markets. Stainless Steel 347 and 347H grades are identified by their alloying elements and stabilization characteristics, allowing engineers and procurement specialists to specify appropriate materials for high-temperature fabrication, structural engineering, and heavy industrial applications with confidence.
Steel Icon Stainless Pvt. Ltd. is one of the leading manufacturer and supplier of ASTM A276 UNS S34700 Round Bar, ASME SA 276 1.4550 Flat Bar, AISI 347 Cold Drawn Bar, SS 347 Hex Bar Supplier, SUS 347 Forged Bar, ASTM A479/ASME SA 479 Bar, SS 347 Square Bar, SS 347 Bright Bar, Stainless Steel 347H Rectangular Bar, SS 347/347H Round Bar at the best price in India.
Request Latest Price & Stock Availability| Standard | ASTM A314 / ASME SA314 |
|---|---|
| Size | 80 mm – 200 mm |
| Length | Exact or random as per buyer’s requirements |
| Single Piece Length | 6 Meter, 3 Meter |
| Material | Stainless Steel |
| Usage | Construction, Household Repair, Manufacturing |
| Shape | Square |
| Thickness | 4 mm |
| Grade | C | Mn | Si | P | S | Cr | N | Ni | Ti |
|---|---|---|---|---|---|---|---|---|---|
| SS 347 | 0.08 max | 2.0 max | 1.0 max | 0.045 max | 0.030 max | 17.00 - 19.00 | 0.10 max | 9.00 - 12.00 | 5(C+N) – 0.70 max |
| SS 347H | 0.04 – 0.10 | 2.0 max | 1.0 max | 0.045 max | 0.030 max | 17.00 - 19.00 | 0.10 max | 9.00 – 12.00 | 4(C+N) – 0.70 max |
| Density | Melting Point | Tensile Strength | Yield Strength (0.2%Offset) | Elongation |
|---|---|---|---|---|
| 8.0 g/cm3 | 1457 °C (2650 °F) | Psi – 75000 , MPa – 515 | Psi – 30000 , MPa – 205 | 35 % |
